<div
  class="item"
  [ngStyle]="{'left': farmX+'%','top':farmY+'%'}"
  [ngClass]="{'on':active===i,'hide-farm':hideSun}">
  <div class="windmill">
    <em class="fans"
        [ngStyle]="{'animation-duration': speed+'s'}"></em>
    <em class="line"></em>
    <em class="grass"> </em>
  </div>
  <span *ngIf="unShowName || 'undefinde'">{{farmName}}</span>
</div>
